ORCID Profile
0000-0002-7751-1058
Current Organisation
University of Southampton
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Publisher: Institution of Engineering and Technology (IET)
Date: 2002
DOI: 10.1049/EL:20020421
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2001
DOI: 10.1109/68.942667
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2002
Publisher: Optica Publishing Group
Date: 09-2002
Publisher: The Optical Society
Date: 13-11-2014
DOI: 10.1364/OE.22.029008
Publisher: Institution of Engineering and Technology (IET)
Date: 1999
DOI: 10.1049/EL:19990780
Publisher: Institution of Engineering and Technology (IET)
Date: 2001
DOI: 10.1049/EL:20010402
Publisher: IEEE
Date: 2003
Publisher: Institution of Engineering and Technology (IET)
Date: 2000
DOI: 10.1049/EL:20001394
Publisher: IEEE
Date: 2001
Publisher: IEEE
Date: 08-2011
Publisher: SPIE
Date: 22-04-2005
DOI: 10.1117/12.602600
Publisher: Opt. Soc. America
Date: 2001
Publisher: SPIE
Date: 14-06-2004
DOI: 10.1117/12.537375
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2003
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 03-2003
Publisher: Institution of Engineering and Technology (IET)
Date: 2001
DOI: 10.1049/EL:20010089
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2000
DOI: 10.1109/50.818906
Publisher: IEEE
Date: 09-2014
Publisher: IEEE
Date: 09-2006
Publisher: Optica Publishing Group
Date: 2004
Abstract: We demonstrate an optical lifier based on an erbium doped holey fiber (EDHF) with a small core. Owing to the high NA, which is readily achievable using holey fiber technology, and the tight physical confinement of the erbium ions, we show that it is possible to achieve an internal gain efficiency of >8.5dB/mW using an aluminosilicate based glass within the core. The dependence of the gain and noise figure performance with respect to fiber length and wavelength are experimentally characterized.
Publisher: Optica Publishing Group
Date: 2004
Abstract: We report the fabrication of the first spun holey optical fibre. Our experiments show that the complex air/glass transverse structure can be retained when the preform is spun during the fibre drawing process. Measurements of differential group delay (DGD) confirm that significant reductions in polarization mode dispersion (PMD) can be readily achieved using this approach.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2005
Publisher: IOP Publishing
Date: 08-06-2001
Publisher: Elsevier BV
Date: 05-2000
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-1999
DOI: 10.1109/50.769313
Publisher: Optica Publishing Group
Date: 2006
DOI: 10.1364/OE.14.010345
Abstract: We report the fabrication of a highly multi-mode square core jacketed air-clad fiber with a top-hat near-field intensity profile. Using this fiber to deliver Q-switched pulses at 1 mum we have successfully produced square shaped ablation marks in indium tin oxide (ITO) without the use of complex beam shaping optics.
Publisher: Elsevier BV
Date: 10-2004
Publisher: IEEE
Date: 2003
Publisher: Institution of Engineering and Technology (IET)
Date: 2001
DOI: 10.1049/EL:20010874
Publisher: IEEE
Date: 07-2014
DOI: 10.1109/SUM.2014.85
Publisher: The Optical Society
Date: 24-04-2014
DOI: 10.1364/OE.22.010544
Publisher: Springer Science and Business Media LLC
Date: 16-07-2003
Publisher: Optica Publishing Group
Date: 2005
Abstract: We present the results of numerical simulations of the modal properties of Photonic Band Gap Fibers (PBGFs) in which a structural distortion of the silica ring surrounding the air core is gradually introduced. We demonstrate that surface modes supported within such fibers are very sensitive to structural distortions, and that any asymmetric change in the structure can break their degeneracy resulting in associated changes in the anticrossing behavior of the orthogonally polarized core modes, and the development of polarization dependent transmission properties. Our results provide insight into recent experimental observations of wavelength dependent PDL and birefringence in PBGFs.
Publisher: Institution of Engineering and Technology (IET)
Date: 2000
DOI: 10.1049/EL:20001446
Publisher: Cellule MathDoc/CEDRAM
Date: 2003
Publisher: IEE
Date: 2005
DOI: 10.1049/CP:20050869
Publisher: OSA
Date: 2015
Publisher: Optica Publishing Group
Date: 09-08-2006
DOI: 10.1364/OL.31.002541
Abstract: We report the results of detailed measurements on the Brillouin frequency shift (BFS), gain bandwidth, and gain coefficients of several small-core holey optical fibers (HFs) of both uniform and axially varying structural characteristics and compare these with measurements on more conventional fibers. Our measurements show that the BFS of HFs is first-order proportional to the modal index for light propagating along the fiber and is thus extremely sensitive to its precise structural parameters. Our results highlight the possibility of using distributed Brillouin scattering measurements to perform nondestructive structural characterization of HFs, and the possibility of producing Brillouin-suppressed HFs using controlled structural variation along the fiber length.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2003
Publisher: Elsevier BV
Date: 05-2010
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for David Richardson.